package com.ybl.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.toolkit.IdWorker;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.ybl.common.BaseContext;
import com.ybl.common.CustomException;
import com.ybl.entity.*;
import com.ybl.mapper.OrderMapper;
import com.ybl.service.*;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.stream.Collectors;

@Service
@Slf4j
public class OrderServiceImpl extends ServiceImpl<OrderMapper, Orders> implements OrderService {

    @Autowired
    private ShoppingCartService shoppingCartService;

    @Autowired
    private UserService userService;

    // 餐位 原地址
    @Autowired
    private SeatsService seatsService;

    @Autowired
    private OrderDetailService orderDetailService;

    /**
     * 用户下单
     */
    @Transactional
    public void submit(Orders orders) {
        //获得当前用户id
        Long userId = BaseContext.getCurrentId();
        //查询当前用户的购物车数据
        LambdaQueryWrapper<ShoppingCart> wrapper = new LambdaQueryWrapper<>();
        wrapper.eq(ShoppingCart::getUserId, userId);
        List<ShoppingCart> shoppingCarts = shoppingCartService.list(wrapper);
        if (shoppingCarts == null || shoppingCarts.size() == 0) {
            throw new CustomException("购物车为空，不能下单");
        }
        //查询用户数据
        User user = userService.getById(userId);
        //查询餐位数据
        Long seatsId = orders.getSeatsId();
        Seats seats = seatsService.getById(seatsId);
        if (seats == null) {
            throw new CustomException("用户餐位信息有误，不能下单");
        }
        //订单号
        long orderId = IdWorker.getId();
        AtomicInteger amount = new AtomicInteger(0);
        //订单明细
        List<OrderDetail> orderDetails = shoppingCarts.stream().map((item) -> {
            OrderDetail orderDetail = new OrderDetail();
            orderDetail.setOrderId(orderId);
            orderDetail.setNumber(item.getNumber());
            orderDetail.setDishFlavor(item.getDishFlavor());
            orderDetail.setDishId(item.getDishId());
            orderDetail.setSetmealId(item.getSetmealId());
            orderDetail.setName(item.getName());
            orderDetail.setImage(item.getImage());
            orderDetail.setAmount(item.getAmount());
            amount.addAndGet(item.getAmount().multiply(new BigDecimal(item.getNumber())).intValue());
            return orderDetail;
        }).collect(Collectors.toList());
        orders.setId(orderId);
        orders.setOrderTime(LocalDateTime.now());
        orders.setCheckoutTime(LocalDateTime.now());
        //订单状态，因为没有支付功能，所以这里是状态2
        orders.setStatus(2);
        orders.setAmount(new BigDecimal(amount.get()));//总金额
        orders.setUserId(userId);
        orders.setNumber(String.valueOf(orderId));
        orders.setUserName(user.getName());
        orders.setPhone(user.getPhone());
        orders.setSeatsId(seats.getId());
        //  修改餐位使用信息
        seats.setSystatus(1);
        seatsService.updateById(seats);
        //向订单表插入数据，一条数据
        this.save(orders);
        //向订单明细表插入数据，多条数据
        orderDetailService.saveBatch(orderDetails);
        //清空购物车数据
        shoppingCartService.remove(wrapper);
    }

    /**
     * 订单的查询功能
     * @param page 页数
     * @param pageSize 每页的数据数量
     * @param number 订单号（模糊查询）
     * @param beginTime 起始时间
     * @param endTime 结束时间
     * @return List<OrdersDto>
     */
    @Override
    public List<Orders> ordersPage(Integer page, Integer pageSize, String number, LocalDateTime beginTime, LocalDateTime endTime) {
//        Page<Orders> pageInfo = new Page<>(page, pageSize);
//        LambdaQueryWrapper<Orders> queryWrapper = new LambdaQueryWrapper<>();
//        queryWrapper.like(number != null, Orders::getNumber, number);
//        //时间范围的查询
//        queryWrapper.gt(beginTime!=null,Orders::getOrderTime,beginTime)
//                .lt(endTime!=null,Orders::getOrderTime,endTime);
//        queryWrapper.orderByDesc(Orders::getOrderTime);
//        this.page(pageInfo, queryWrapper);
//        // 创建ordersDtoPage对象，并且copy
//        Page<OrdersDto> ordersDtoPage = new Page<>();
//        BeanUtils.copyProperties(pageInfo,ordersDtoPage);
//        List<Orders> records = pageInfo.getRecords();
//        List<OrdersDto> list = records.stream().map((item) -> {
//            OrdersDto ordersDto = new OrdersDto();
//            BeanUtils.copyProperties(item, ordersDto);
//            Long orderId = item.getId();
//            //根据id查询分类对象
//            OrderDetail byId = orderDetailService.getById(orderId);
//            if (byId != null) {
//
//            }
//            return dishDto;
//        }).collect(Collectors.toList());
//        ordersDtoPage.setRecords(list);
        return null;
    }
}